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See Technical Specifications

LM4871M

Amplifier IC 1-Channel (Mono) Class AB 8-SOIC

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

LM4871M
Datasheet:

LM4871M Datasheet (PDF)
Series:

Boomer®
Type:

Class AB
Output Type:

1-Channel (Mono)
Max Output Power x Channels @ Load:

3W x 1 @ 3Ohm
EDA/CAD Models:

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LM4871M General Description

The LM4871 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3Ω load with less than 10% THD when powered by a 5V power supply (see Note). To conserve power in portable applications, the LM4871's micropower shutdown mode (I_Q = 0.6µA, typ) is activated when V_DD is applied to the SHUTDOWN pin.

Boomer audio power amplifiers are designed specifically to provide high power, high fidelity audio output. They require few external components and operate on low supply voltages from 2.0V to 5.5V. Since the LM4871 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is ideally suited for low-power portable systems that require minimum volume and weight.

Additional LM4871 features include thermal shutdown protection, unity-gain stability, and external gain set.

Note: An LM4871LD that has been properly mounted to a circuit board will deliver 3W into 3Ω (at 10% THD). The other package options for the LM4871 will deliver 1.5W into 8Ω (at 10% THD). See the section for further information concerning the LM4871LD, LM4871MM, LM4871M, and the LM4871N.

Key Features

No Output Coupling Capacitors, Bootstrap Capacitors, or Snubber Circuits Required
Unity-gain Stable
WSON, VSSOP, SOIC, or PDIP Packaging
External Gain Configuration Capability
Pin Compatible with the LM4861

Key Specifications

PO at 10% THD+N, 1kHz
- LM4871LD: 3Ω , 4Ω Loads; 3W (typ),
  2.5 W (typ)
- All other LM4871 Packages: 8Ω load
  1.5 W (typ)
Shutdown Current 0.6µA (typ)
Supply Voltage Range 2.0V to 5.5 V
THD at 1kHz at 1W Continuous Average Output Power into 8Ω 0.5% (max)

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Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersAudio Amplifiers	Series	Boomer®
Type	Class AB	Output Type	1-Channel (Mono)
Max Output Power x Channels @ Load	3W x 1 @ 3Ohm	Voltage - Supply	2V ~ 5.5V
Features	Shutdown, Thermal Protection	Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)	Base Product Number	LM4871
Audio input type	Analog Input	Architecture	Class-AB
Speaker channels (max)	Mono	Rating	Catalog
Power stage supply (max) (V)	5.5	Power stage supply (min) (V)	2
Load (min) (Ω)	3	Output power (W)	3
THD + N at 1 kHz (%)	0.13	Iq (typ) (mA)	6.5
Control interface	Hardware	Closed/open loop	Closed
Analog supply (min) (V)	2	Analog supply voltage (max) (V)	5.5
PSRR (dB)	60	Operating temperature range (°C)	-40 to 85
Pin Count	8	Released Date	Apr 16, 2015
Last Modified Date	Mar 7, 2023 4:10 PM UTC